Trouble with BE6-II w/566 Celeron @850

[Arount]

My system went dead. Replaced 566@850 with 366@550 and it ran for a week and got sluggish so I attempted to reboot and now it will not post. I did manage to get it up twice and function but that was it. I've swapped ram and removed everything but the video card which I've replaced as well. Went to a standard 600 Celeron and it did not post either. Could it be the motherboard? Does anyone have any history with this type of problem?

Thanks,
Art

 

[Poof]

I hope this isn't a stupid question but did you try clearing the CMOS?

 

[Arount]

Yes, first thing I tried.

 

[Poof]

Then I'm wondering if it's shorting on something in the case... or could be something flaky in the power supply... Do you have another machine with a different PS that you could try?

 

[Arount]

Took the motherboard out and laid it on the bench and no change. Changed power supply and the 366@550 posts everytime. Swapped back to the 566@850 which I had written off as bad and it posted twice then wouldn't post again. Swapped them again and the 550 posted everytime (about 10 times). Swapped them again and the 850 posted twice again and quit. I'd suspect the power supply as the culprit. Could the power supply have damaged the other CPU (850) to begin with or vice versa (CPU cause the power supply problems?) I had this in an Antec 830 case which I suspect the power supply to be bad.

Thanks for any help,
Art

 

[Poof]

Is that celly 566 one of the newer cumine flip chips (I think that's around the speed they started at)? If so, the voltage should need to be very different for it as compared to the older celly (ie., it uses less).

I'm wondering if there's a voltage problem going on.... :frown:

 

[Arount]

Think the 566 is the newer (low voltage) chip. Shouldn't that work before the higher voltage (366) chip does? The 366@550 is posting every single time with another power supply. Not sure if the 566 is faulty because most times it will not post with the new power supply. Might have two different problems first being the 566 chip going out about a week or two ago and I swapped processors then the 366 started acting sluggish and when I attempted to reboot it wouldn't post.

Art

 

[Arount]

If there is a voltage problem would a new PS take care of it?

Art

 

[Poof]

Well if it's set for auto and it's not correctly sensing that celermine, then that's a problem. If you can get into the BIOS at least once with the 566, see if you can manually set the voltage and then try to boot.

 

[Arount]

The Abit Slocket is jumpered to "auto" and the bios is set manually (user define)for both CPU's

Art

 

[Poof]

I'm wondering if you can try reversing it - set the voltage on the slocket and set the mobo to auto...

I've never had the opportunity to deal with a slocket but know people who have... It could be the slocket giving you troubles if it's not supplying the necessary voltage...

 

[Arount]

Nothing has changed after all I've tried. Once I get the system to boot and shut down it won't restart unless I cycle the power switch on the power supply which might take several trys before it comes back up. It must be the motherboard because it does it with both processors either set to auto or jumpered, changed ram, power supply and video card. I've run the motherboard out of the case and disconnected all drives and other cards. I guess it all boils down to the motherboard.

Art

 

[Poof]

Geez... only thing I can say is perhaps that is true. If the PS is flaky, it could have messed up a VRM or something on the mobo...

 

[Jarhead]

Arount,

I'm wondering if you have these CPUs on different slokets?

If so, have you cleaned of the old thermal grease and
re-applied new grease? The 566 may be getting warm and
locking up during the Power On Self Test...

Humm, that BE6 has a voltage monitor in BIOS, you might
want to write down the values and let it sit over night
and then take a look in the morning to see if the voltages
have changed.

If you have a meter, set it for 300mV AC (yes I know you are
measuring DC), and then look at the outputs of your system
P.S. It should less than 20mV AC (or so). Why? Depending
on the age of the capacitors in your power supply, and
the quality of the power supply, the electrolytics may be
drying up...the value goes down, and you get more ripple...
they do that over time.

 

[Jarhead]

Hey Poof.

Keep up the good work.

 

[bhess]

Could it be a bad bios? Maybe try flashing to a newer bios. Might be worth a shot.